日本航空宇宙学会誌

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衛星からの地球観測のための新しい手段

畚野信義

1983 年 31 巻 352 号 p. 225-233
発行日: 1983/05/05
公開日: 2009/05/25

DOIhttps://doi.org/10.2322/jjsass1969.31.225

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人工衛星のディジタル姿勢制御

真鍋舜治

1983 年 31 巻 352 号 p. 234-242
発行日: 1983/05/05
公開日: 2009/05/25

DOIhttps://doi.org/10.2322/jjsass1969.31.234

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新しいジェット・エンジン

今井兼一郎

1983 年 31 巻 352 号 p. 242-252
発行日: 1983/05/05
公開日: 2009/05/25

DOIhttps://doi.org/10.2322/jjsass1969.31.242

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第4回有限要素法による流れ解析国際シンポジウム開催報告

中山司

1983 年 31 巻 352 号 p. 253-256
発行日: 1983/05/05
公開日: 2009/05/25

DOIhttps://doi.org/10.2322/jjsass1969.31.253

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マイクロ波放電円管内非平衡アルゴンプラズマ流の測定

白井紘行, 田部井勝稲

1983 年 31 巻 352 号 p. 257-263
発行日: 1983/05/05
公開日: 2009/05/25

DOIhttps://doi.org/10.2322/jjsass1969.31.257

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Nonequilibrium argon plasma flows in a circular tube were generated by an electrodeless discharge at the conditions of low input powers (30-70W)and low pressures (0.27-1.33kPa). Electron current was collected by an unsymmetric double probe and analysed to obtain electron temperature and electron density by taking account of non-MAXWELL electron energy distribution and the reflection of electrons on probe surface. Radiative properties of the plasmas were measured spectroscopically to examine electronic excitation nonequilibrium and the effect of non-MAXWELL electrons.
The generated plasmas were found to have electron temperature of 3-4×10⁴K and electron density of -10¹¹ cm^-3 and to be extremely in thermo-chemical nonequilibrium. It is emphasized that the consideration of non-MAXWELL electrons is important in the interpretation of the characteristic of collected electron current and the radiative properties of plasmas.

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二次元圧縮コーナーによる衝撃波と境界層の干渉について

斎田暢三, 前田泰幸, 服部仁志

1983 年 31 巻 352 号 p. 263-267
発行日: 1983/05/05
公開日: 2010/01/13

DOIhttps://doi.org/10.2322/jjsass1969.31.263

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ダクテッドロータのピッチダンピング

内藤晃

1983 年 31 巻 352 号 p. 268-274
発行日: 1983/05/05
公開日: 2009/05/25

DOIhttps://doi.org/10.2322/jjsass1969.31.268

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Pitch damping of ducted rotor is important to study dynamic stability of ducted rotor type VTOL aircraft.
In this paper, pitch damping of a ducted rotor has been studied by using unducted and ducted model rotors in rocking motion. These rotors have semi-rigid blades with spring constrained hinges. The spring is made of FRP plate and by different combination of the plates as the hinge stiffness of blade can be changed.
At first the relation between pitch damping and hinge stiffness of unducted rotor has been studied experimentally. The result has coincided those with AzuMA and NAKAMVRA's paper.⁵⁾ Nextly, the theoretical analysis has been conducted about pitch damping of the ducted rotor based on momentum theory and the result has been examined experimentally.
As the result of the analysis, it is pointed out that the pitch damping of ducted rotor consists of three parts, viz., increased pitch damping of rotor owing to the decrease of blade tip loss, pitch damping by momentum change of duct inflow in rocking motion and negative pitch damping (divergent force) by duct lip.
It has been clearly shown in the experimental result that the pitch damping of the ducted rotor is stronger than that of unducted rotor.

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